Seems like you are using AEM Forms OSGi. The info which I have shared above is applicable to AEM Forms JEE installation. MS sharepoint connector is not supported in 6.5 OSGi but it is supported in JEE flavor. 

Yes, you may run the configurationManager executable from <AEMFormsInstallationFolder>/configurationManager/bin folder.

All these features are already available in AEM Forms Designer, as shown below: For more details, refer to this link:https://help.adobe.com/en_US/AEMForms/6.1/DesignerHelp/WS92d06802c76abadb-728f46ac129b395660c-7f8c.2.html Also, for Importing Adobe Output Designer Form files, refer to this documenta...

Can you please explain what this "Import filter" installation is used for? I was not able to find any documentation for the same.

Adobe LiveCycle Designer was rebranded as AEM Forms Designer, which comes as a separate installer now. To purchase this, you may contact Adobe Sales. 

MS Sharepoint connector is still supported in 6.5, as per the screenshot from AEM Forms 6.5 Configuration Manager below:   Also, you may refer to this documentation to configure the same.https://experienceleague.adobe.com/docs/experience-manager-65/forms/administrator-help/connect-content-management...

Can you test this on the latest 6.5.11 Service pack? 

Can you please refer to this link and check if it helps. Also, if It doesn't help, then please share(use google drive) your sample form you are facing issue with. Thanks!

Looks like applying color property is not supported for Floating fields, as their purpose is to display only the dynamic text. You may use a Text field with no borders in place of a Folating field. 

I just tried the following script on the mouseEnter event, and it is working as expected for me:  form1.#subform[0].DecimalField1::mouseEnter - (JavaScript, client) xfa.resolveNode("form1.#subform.DecimalField1").ui.oneOfChild.border.fill.color.value = "255, 255, 0";Here is the output: